You can change the protocol of the stream to Wowza using FFMPEG if needed.
Sending the stream to Wowza using RTMP would be simpler and the tutorial does have a section on how to do this.
FFmpeg can publish streams using other outgoing protocols such as RTMP and RTSP/RTP (QuickTime ANNOUNCE).
To send a stream using RTMP, change the destination portion of the FFmpeg URL:
-f mpegts udp://127.0.0.1:10000?pkt_size=1316
After applying this to FFMPEG the publishing stream will be going to application "live" with stream name myStream
-f flv rtmp://127.0.0.1/live/myStream
Playback form Wowza would also be:
RTMP - rtmp://[wowza-ip-address]:1935/live/myStream
RTSP - rtsp://[wowza-ip-address]:1935/live/myStream
Apple HLS - http://[wowza-ip-address]:1935/live/myStream]/playlist.m3u8
Flash HDS - http://[wowza-ip-address]:1935/live/myStream/manifest.f4m
Silverlight - http://[wowza-ip-address]:1935/live/myStream/Manifest